﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _11._7
{
    internal class TestClass
    {
        public int val;
        public static TestClass operator + (TestClass a, TestClass b)
        {
            TestClass rc = new TestClass();
            rc.val=a.val + b.val;
            return rc;
        }
        public static TestClass operator -(TestClass c)
        {
            TestClass rc = new TestClass();
            rc.val=-c.val;
            return rc;
        }
       
    }
}
